One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,8)(3,7,4,6)(9,10,13,12)(11,14,16,15)(17,18,22,27)(19,26,29,25)(20,23,28,24)(21,31,30,32)(1,3,5,4)(2,6,8,7)(9,11)(10,14)(12,15)(13,16)(17,19,22,29)(18,25,27,26)(20,31,28,32)(21,24,30,23)(1,3,5,4)(2,7,8,6)(9,12,13,10)(11,15,16,14)(17,20,23,27,22,28,24,18)(19,26,30,31,29,25,21,32)(1,3,5,4)(2,7,8,6)(11,16)(14,15)(17,21,24,29,22,30,23,19)(18,26,28,32,27,25,20,31)(1,4,5,3)(2,7,8,6)(18,27)(20,28)(25,26)(31,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.